Slate, a New York comedian, was performing in "Biker Chicks Chat," playing a foulmouthed motorcycle-driving woman clad in leather, when she dropped the curse word, which slipped by censors and was heard by East Coast viewers of the show.

"You frickin' just threw an ashtray full of butts at my head. You know what, you stood up for yourself and I f***in' love you for that," Slate said to Wiig's fellow biker chick in the skit.

Whether Slate's expletive was intentional wasn't clear, but the actress did puff out her cheeks after the swear word to indicate her embarrassment and apparent regret at her slip-up.

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Other "SNL" castmembers to swear on-air include Norm MacDonald, who received a verbal warning for saying the F-word on-air, and Charles Rocket, who dropped the F-bomb in 1981.

It wasn't immediately known if any disciplinary action was taken against Slate.